Runner's Bum 

The phrase used to describe running whilst needing to excrete one's bowls, the sufferer then has 2 choices:
- clench their arse and hope for the best
- shit their pants

"Paula Radcliffe shit herself in the marathon", "oh yeah we've all had runner's bum"

Runner's Bum by Mahoganay October 12, 2013

miami beach bum 

Fun, chill person. That one friend we all want to be like. The one posting palm trees and bikinis in the winter, while you're freezing. Sporty, a natural beauty and confident. Can't even be mad because they're inclusive of everyone with a radiating positive energy.

Friend 1: I wish I was a Miami Beach Bum.

Friend 2: I know, then you'd have great skin.

miami beach bum by miamibeachbum305 December 8, 2021

dry bum 

anal sex devoid of lubricant

can i get you drunk and dry bum you?

dry bum by mrgoat January 28, 2004

Snub Bum

Someone who thinks they have an ass... but they dont... its actually just a back with legs connected. When boys stuff there front package beacause they are lacking these girls should stuff their back package!

Ryley: Dude did you see that fuckin' snub bum?
Nathaniel: Yeah Man She needs to stuff that shit!
Ryley: Tots MaGots

Snub Bum by I Think I Will Party Naked April 17, 2010

shot bum 

The seat behind the driver in the car. The seat beside the driver is shotgun. The seat behind the shotgun is cobain.

Shotgun is the best seat in a car because you have a dominant position and the best view and more leg room. However, if the driver is short and has the seat pulled forward, shot bum can have more leg room than shotgun or cobain, who will be ready to blow his brains out because he has no leg room.

Bif- "Shotgun."

Skippy - "Dude, I called it like 3 minutes ago."

Bif - Okay, I want shot bum then because Kelly has the seat all the way forward.

Matt - I guess that means I get cobain

shot bum by Rex Roddy August 25, 2010

squeaky bum time 

the tense final stages of a league competition, especially from the point of view of the leaders, usually used in football (soccer)

With ten more games remaining in the season, its squeaky bum time for the league leaders, who cannot afford any more slip ups in their remaining games.

squeaky bum time by Ron Atkinson December 12, 2008

Up your bum! 

Very simply put, 'up your bum' is the ultimate Australian toast. It's not meant literally ('stick it up your ass and rotate', more the opposite, much like the toast: "mud in your eye". Also, it is very important to say it the right way. If you go in 'half assed' with this toast, you'll get strange looks (as an American friend of mine found out, when I recommended him to try it Queensland). Say it with a little confidence and a smile, but don't be aggressive - that's not the right way to go about things in the broad brown land of oz. Most of all - enjoy this toast with a large, cold sparkling amber beverage under the Aussie sky with a good mate.

(At the pub)
Andy: Cheers big ears!
Toddles: Up your bum!
(both take a very hefty swig, exhale loudly and exude a happiness unknown to those not sitting with you at that moment ;-)

Up your bum! by AndrewO May 15, 2006